/**
* Set the value to a key.
*
* This method returns true on success and false on failure.
* $ttl is measured in seconds. If it is zero, the key should not expire.
*
* @param string $key
* @param mixed $value
* @param int $ttl
* @param bool $force
* @return bool
*/
public function set($key, $value, $ttl = 0, $force = false)
{
return Storage::writePHPData($this->_getFilename($key), array($ttl ? time() + $ttl : 0, $value), $key);
}
